Sorry it's taken so long to get back....
I'm in Canada so I don't know where Thins are sold in America, but lots of little conveniece stores here sell them, hence most there would as well, and Costco Wholesale sells them.. I don't know if you have Costco..?
Hopefully you can find them somewhere, they really are a great treat!!

Be careful with sugar free candies, like Icebreakers sours, that use sugar alcohols as sweeteners. They're fine if you just eat the serving amount on the package, but avoid eating too much, as they can cause pretty bad stomach cramps and diarrhea.